Abstract

SputteredNb3Gefilms are doped with hydrogen by exposing them to acid and the effects of this hydrogen are studied. The hydrogen content of these films is measured using the 15N nuclear resonance profiling method. Hydrogen incorporated at concentrations up to 1.8×1022 cm−3 (23 at.%) expands the lattice up to 2.5% and depresses the superconducting transition temperature Tc, ∼1 K per 1021 H atoms/cm3. Hydrogen is also found in as‐sputtered films, the amount increasing as the film deposition temperature is reduced.